/**
 * SPDX-FileCopyrightText: 2018-2020 Black Hat <bhat@encom.eu.org>
 * SPDX-FileCopyrightText: 2020 Carl Schwan <carl@carlschwan.eu>
 *
 * SPDX-License-Identifier: GPL-3.0-only
 */
import QtQuick 2.14
import QtQuick.Controls 2.14 as QQC2
import QtQuick.Layouts 1.14

import org.kde.kirigami 2.12 as Kirigami

import org.kde.neochat 1.0
import NeoChat.Component 1.0
import NeoChat.Panel 1.0
import NeoChat.Dialog 1.0
import NeoChat.Page 1.0

Kirigami.ApplicationWindow {
    id: root
    property var currentRoom: null

    Connections {
        target: root.quitAction
        function onTriggered() {
            Qt.quit()
        }
    }

    /**
     * Manage opening and close rooms
     */
    QtObject {
        id: roomManager

        property var currentRoom: null
        property alias pageStack: root.pageStack
        property bool invitationOpen: false
        property var roomList: null

        readonly property bool hasOpenRoom: currentRoom !== null

        signal leaveRoom(string room);
        signal openRoom(string room);

        function loadInitialRoom() {
            if (Config.openRoom) {
                const room = Controller.activeConnection.room(Config.openRoom);
                currentRoom = room;
                let item = pageStack.push(roomPage, { 'currentRoom': room, });
                connectRoomToSignal(item);
            } else {
                // TODO create welcome page
            }
        }

        function enterRoom(room) {
            let item = null;
            if (currentRoom != null || invitationOpen) {
                currentRoom = null;
                item = pageStack.replace(roomPage, { 'currentRoom': room, });
            } else {
                item = pageStack.push(roomPage, { 'currentRoom': room, });
            }
            currentRoom = room;
            Config.openRoom = room.id;
            Config.save();
            connectRoomToSignal(item);
            return item;
        }

        function openInvitation(room) {
            if (currentRoom != null) {
                currentRoom = null;
                pageStack.removePage(pageStack.lastItem);
            }
            invitationOpen = true;
            pageStack.push("qrc:/imports/NeoChat/Page/InvitationPage.qml", {"room": room});
        }

        function getBack() {
            pageStack.replace(roomPage, { 'currentRoom': currentRoom, });
        }

        function connectRoomToSignal(item) {
            console.log("connect")
            if (!roomList) {
                console.log("Should not happen: no room list page but room page");
            }
            item.switchRoomUp.connect(function() {
                roomList.goToNextRoom();
            });

            item.switchRoomDown.connect(function() {
                roomList.goToPreviousRoom();
            });
        }
    }

    function pushReplaceLayer(page, args) {
        if (pageStack.layers.depth === 2) {
            pageStack.layers.replace(page, args);
        } else {
            pageStack.layers.push(page, args);
        }
    }

    function showWindow() {
        root.show()
        root.raise()
        root.requestActivate()
    }

    contextDrawer: RoomDrawer {
        id: contextDrawer
        enabled: roomManager.hasOpenRoom
        room: roomManager.currentRoom
        handleVisible: enabled && pageStack.layers.depth < 2
    }

    globalDrawer: Kirigami.GlobalDrawer {
        isMenu: true
        property bool hasLayer
        actions: [
            Kirigami.Action {
                text: i18n("Explore rooms")
                icon.name: "compass"
                onTriggered: pushReplaceLayer("qrc:/imports/NeoChat/Page/JoinRoomPage.qml", {"connection": Controller.activeConnection})
                enabled: pageStack.layers.currentItem.title !== i18n("Explore Rooms")
            },
            Kirigami.Action {
                text: i18n("Start a Chat")
                icon.name: "irc-join-channel"
                onTriggered: pushReplaceLayer("qrc:/imports/NeoChat/Page/StartChatPage.qml", {"connection": Controller.activeConnection})

                enabled: pageStack.layers.currentItem.title !== i18n("Start a Chat")
            },
            Kirigami.Action {
                text: i18n("Create a Room")
                icon.name: "irc-join-channel"
                onTriggered: {
                    let dialog = createRoomDialog.createObject(root.overlay);
                    dialog.open();
                }

                enabled: pageStack.layers.currentItem.title !== i18n("Start a Chat")
            },
            Kirigami.Action {
                text: i18n("Accounts")
                icon.name: "im-user"
                onTriggered: pushReplaceLayer("qrc:/imports/NeoChat/Page/AccountsPage.qml")
                enabled: pageStack.layers.currentItem.title !== i18n("Accounts")
            },
            Kirigami.Action {
                text: i18n("Settings")
                icon.name: "settings-configure"
                onTriggered: pushReplaceLayer("qrc:/imports/NeoChat/Page/SettingsPage.qml")
                enabled: pageStack.layers.currentItem.title !== i18n("Settings")
            },
            Kirigami.Action {
                text: i18n("About Neochat")
                icon.name: "help-about"
                onTriggered: pushReplaceLayer(aboutPage)
                enabled: pageStack.layers.currentItem.title !== i18n("About")
            }
        ]
    }

    Component {
        id: aboutPage
        Kirigami.AboutPage {
            aboutData: Controller.aboutData
        }
    }

    pageStack.initialPage: LoadingPage {}

    Component {
        id: roomListComponent
        RoomListPage {
            id: roomList
            roomListModel: spectralRoomListModel
            activeConnection: Controller.activeConnection
        }
    }

    Connections {
        target: Controller

        onInitiated: {
            if (Controller.accountCount === 0) {
                pageStack.replace("qrc:/imports/NeoChat/Page/LoginPage.qml", {});
            } else {
                roomManager.roomList = pageStack.replace(roomListComponent, {'activeConnection': Controller.activeConnection});
                roomManager.loadInitialRoom();
            }
        }

        onConnectionAdded: {
            if (Controller.accountCount === 1) {
                roomManager.roomList = pageStack.replace(roomListComponent);
            }
        }

        onConnectionDropped: {
            if (Controller.accountCount === 0) {
                pageStack.clear();
                pageStack.replace("qrc:/imports/NeoChat/Page/LoginPage.qml");
            }
        }

        onGlobalErrorOccured: showPassiveNotification(error + ": " + detail)

        onShowWindow: root.showWindow()
    }

    RoomListModel {
        id: spectralRoomListModel

        connection: Controller.activeConnection
    }

    Component {
        id: roomPage

        RoomPage {}
    }

    Component {
        id: createRoomDialog

        CreateRoomDialog {}
    }
}